🇺🇸 ROSENBERG Kevin · USA
3rank
+65.5Butler · 98 bds
+0.67per board
±4.4swing
+1.69vs par /bd · #1/21
+0.53adjusted /bd
by round
vs par split: bidding +1.23 · play +0.46
Strength of schedule: opponents averaged -0.14/bd (an easy draw) → opponent-adjusted +0.53/bd
Card play — on target: opening leads 76.0% #12 of 21 · declarer play 81.5% #5 of 21 · defence 87.5% #5 of 21
| vs NT | vs a suit | |
|---|---|---|
| Opening leads | 57.1% (7) | 83.3% (18) |
| Declarer play | 83.3% (6) | 81.0% (21) |
| Defence | 92.3% (13) | 85.7% (35) |
Opening leads by suit led: ♠ 80.0% (10) · ♥ 83.3% (6) · ♦ 40.0% (5) · ♣ 100.0% (4)
vs par by strain: NT +1.74 (23) · a suit +1.68 (75)
vs par by level: part-score +2.27 (34) · game +1.23 (60) · slam +3.75 (4)
By role: declaring +1.07/bd (+0.04 vs par · 50) · defending +0.25/bd (+3.42 vs par · 48)
By vulnerability: vulnerable +0.77/bd (+1.82 vs par · 49) · not vulnerable +0.57/bd (+1.57 vs par · 49)
By round↑ top
| Round | Partner | Opponents | Room | Bds | Butler | Avg | vs par |
|---|---|---|---|---|---|---|---|
| Quarterfinal | A.Tebha | M.Alishaw – S.Kennedy | Closed | 14 | +27.6 | +1.97 | +3.00 |
| Quarterfinal | A.Tebha | B.Norton – N.Apteker | Open | 14 | +5.8 | +0.41 | +0.79 |
| Semifinal | A.Tebha | B.Xiong – S.Sun | Open | 14 | +4.6 | +0.33 | +0.29 |
| Semifinal | A.Tebha | N.Si – Y.Zhou | Open | 14 | -6.7 | -0.48 | +2.29 |
| Semifinal | A.Tebha | B.Xiong – S.Sun | Open | 14 | +39.6 | +2.83 | +3.14 |
| Final | A.Tebha | R.Yamada – T.Hino | Open | 14 | -3.8 | -0.27 | +3.07 |
| Final | A.Tebha | T.Hino – R.Yamada | Closed | 14 | -1.6 | -0.11 | -0.71 |
Every board — best Butler first↑ top
vs par = IMPs this pair scored above (+) or below (−) the board’s double-dummy par — what bidding and play (theirs and the opponents’) added or gave away against perfect play.
| Butler | Round | Opponents | Bd | Contract | Lead | Res | vs par |
|---|---|---|---|---|---|---|---|
| +11.3 | Semifinal | SYNREY RDFZ | 54 | 5♥x | ♠5 | -2 | +12 |
| +9.4 | Quarterfinal | NORTON | 10 | 2♠x | ♥K | +1 | +14 |
| +9.3 | Quarterfinal | NORTON | 7 | 5♣ | ♦K | -1 | +12 |
| +9.3 | Quarterfinal | NORTON | 23 | 4♠ | ♥Q | +2 | +13 |
| +9.3 | Semifinal | SYNREY RDFZ | 44 | 4♠ | ♦A | = | +1 |
| +9.0 | Semifinal | SYNREY RDFZ | 46 | 3NT | ♥6 | +1 | +13 |
| +8.7 | Quarterfinal | NORTON | 6 | 3NT | ♦10 | -1 | +10 |
| +8.7 | Quarterfinal | NORTON | 19 | 4♠x | ♣10 | = | +9 |
| +7.7 | Final | 🇯🇵 JAPAN | 10 | 3♣ | ♥A | -2 | +3 |
| +7.3 | Semifinal | SYNREY RDFZ | 22 | 3NT | ♥Q | +1 | +1 |
| +6.7 | Semifinal | SYNREY RDFZ | 19 | 4♠ | ♦K | = | +0 |
| +6.7 | Final | 🇯🇵 JAPAN | 18 | 2♣ | ♥Q | -4 | +7 |
| +6.3 | Final | 🇯🇵 JAPAN | 9 | 4♦ | ♠2 | -2 | +2 |
| +5.3 | Semifinal | SYNREY RDFZ | 47 | 1NT | ♦6 | +2 | +6 |
| +5.1 | Quarterfinal | NORTON | 4 | 1NT | ♠10 | = | +6 |
| +5.0 | Quarterfinal | NORTON | 22 | 3♦ | ♥A | = | +0 |
| +5.0 | Semifinal | SYNREY RDFZ | 3 | 3♥ | ♠10 | = | +6 |
| +4.0 | Semifinal | SYNREY RDFZ | 2 | 2♦ | ♣6 | -2 | -2 |
| +4.0 | Final | 🇯🇵 JAPAN | 1 | 5♦x | ♥2 | -3 | +8 |
| +3.7 | Semifinal | SYNREY RDFZ | 50 | 4♠ | ♣Q | +1 | -11 |
| +3.7 | Final | 🇯🇵 JAPAN | 19 | 5♥ | ♦Q | +1 | +14 |
| +3.3 | Semifinal | SYNREY RDFZ | 11 | 3♣ | ♥5 | +1 | +6 |
| +3.3 | Final | 🇯🇵 JAPAN | 17 | 3NT | ♥10 | = | -1 |
| +2.9 | Quarterfinal | NORTON | 8 | 4♠ | ♣6 | = | +0 |
| +2.7 | Semifinal | SYNREY RDFZ | 45 | 4♥ | ♦2 | -1 | +10 |
| +2.7 | Final | 🇯🇵 JAPAN | 8 | 3♦ | ♣K | +2 | +13 |
| +2.7 | Final | 🇯🇵 JAPAN | 13 | 5♣ | ♠A | -2 | +8 |
| +2.3 | Final | 🇯🇵 JAPAN | 21 | 4♠ | ♣6 | = | +0 |
| +2.1 | Quarterfinal | NORTON | 18 | 3♠ | ♣K | -3 | +0 |
| +2.0 | Quarterfinal | NORTON | 13 | 3NT | ♠6 | -3 | +5 |
| +2.0 | Semifinal | SYNREY RDFZ | 13 | 2♥ | ♦6 | = | +12 |
| +1.9 | Quarterfinal | NORTON | 20 | 6♠ | ♠3 | = | +0 |
| +1.7 | Quarterfinal | NORTON | 9 | 1NT | ♦A | +2 | +7 |
| +1.7 | Semifinal | SYNREY RDFZ | 4 | 4♥ | ♠4 | +2 | +1 |
| +1.7 | Semifinal | SYNREY RDFZ | 6 | 2♠ | ♥K | = | +0 |
| +1.7 | Final | 🇯🇵 JAPAN | 15 | 1NT | ♥9 | +2 | -6 |
| +1.7 | Final | 🇯🇵 JAPAN | 27 | 2♠ | ♥2 | +1 | +0 |
| +1.4 | Quarterfinal | NORTON | 28 | 4♥ | ♠2 | +1 | +0 |
| +1.3 | Semifinal | SYNREY RDFZ | 7 | 4♠ | ♥10 | = | +1 |
| +1.3 | Semifinal | SYNREY RDFZ | 52 | 4♥ | ♣A | -1 | -2 |
| +1.3 | Semifinal | SYNREY RDFZ | 55 | 2♥ | ♣3 | = | +6 |
| +1.3 | Semifinal | SYNREY RDFZ | 56 | 4♥ | ♠K | +1 | +0 |
| +1.0 | Quarterfinal | NORTON | 5 | 1NT | ♣K | -1 | +2 |
| +1.0 | Semifinal | SYNREY RDFZ | 20 | 4♠ | ♥A | +1 | +11 |
| +1.0 | Semifinal | SYNREY RDFZ | 43 | 3NT | ♠6 | = | +2 |
| +1.0 | Semifinal | SYNREY RDFZ | 51 | 3NT | ♥3 | -2 | +7 |
| +1.0 | Final | 🇯🇵 JAPAN | 20 | 3NT | ♠7 | +1 | +1 |
| +0.9 | Quarterfinal | NORTON | 25 | 2♥ | ♠A | -2 | +11 |
| +0.7 | Semifinal | SYNREY RDFZ | 16 | 3♥ | ♦A | -1 | +2 |
| +0.7 | Semifinal | SYNREY RDFZ | 25 | 3NT | ♦Q | -5 | +9 |
| +0.7 | Final | 🇯🇵 JAPAN | 6 | 3NT | ♠8 | +2 | +0 |
| +0.6 | Quarterfinal | NORTON | 16 | 4♥ | ♦K | +1 | +1 |
| +0.3 | Semifinal | SYNREY RDFZ | 9 | 6NT | ♣5 | +1 | -11 |
| +0.3 | Final | 🇯🇵 JAPAN | 12 | 4♠ | ♥A | +1 | +0 |
| +0.1 | Quarterfinal | NORTON | 3 | 2NT | ♣6 | -1 | -1 |
| +0.0 | Semifinal | SYNREY RDFZ | 5 | 4♠ | ♥A | +1 | -1 |
| +0.0 | Semifinal | SYNREY RDFZ | 24 | 4♥ | ♦6 | +1 | +10 |
| +0.0 | Semifinal | SYNREY RDFZ | 28 | 4♥ | ♠10 | = | +0 |
| +0.0 | Final | 🇯🇵 JAPAN | 7 | 2♦ | ♦K | = | +5 |
| -0.0 | Final | 🇯🇵 JAPAN | 24 | 4♠ | ♥K | = | +0 |
| -0.0 | Final | 🇯🇵 JAPAN | 25 | 4♥ | ♠J | -1 | -6 |
| -0.3 | Semifinal | SYNREY RDFZ | 15 | 5♣ | ♦5 | = | +3 |
| -0.3 | Semifinal | SYNREY RDFZ | 17 | 5♠ | ♥J | +1 | -11 |
| -0.3 | Semifinal | SYNREY RDFZ | 18 | 4♥ | ♦J | +2 | +11 |
| -0.3 | Semifinal | SYNREY RDFZ | 48 | 4♠ | ♦K | +1 | +0 |
| -0.3 | Final | 🇯🇵 JAPAN | 14 | 1NT | ♠2 | +2 | -1 |
| -0.9 | Quarterfinal | NORTON | 21 | 3♠ | ♠3 | = | +0 |
| -1.0 | Final | 🇯🇵 JAPAN | 26 | 4♠ | ♦4 | = | -13 |
| -1.1 | Quarterfinal | NORTON | 1 | 3NT | ♠10 | +1 | +1 |
| -1.3 | Semifinal | SYNREY RDFZ | 8 | 3♣ | ♥3 | = | +0 |
| -1.3 | Semifinal | SYNREY RDFZ | 21 | 3♠ | ♦A | = | -7 |
| -1.7 | Semifinal | SYNREY RDFZ | 10 | 3♣ | ♦K | = | +1 |
| -1.7 | Final | 🇯🇵 JAPAN | 16 | 4♥ | ♦K | -2 | -3 |
| -2.1 | Quarterfinal | NORTON | 12 | 2♠ | ♦A | -1 | -4 |
| -2.4 | Quarterfinal | NORTON | 14 | 2♥ | ♥2 | +1 | +0 |
| -2.4 | Quarterfinal | NORTON | 26 | 4♥ | ♥A | -1 | -6 |
| -2.7 | Quarterfinal | NORTON | 15 | 3NT | ♠7 | = | -7 |
| -3.0 | Semifinal | SYNREY RDFZ | 12 | 4♠ | ♣K | = | +0 |
| -3.0 | Semifinal | SYNREY RDFZ | 49 | 4♥ | ♥3 | +1 | +0 |
| -3.3 | Final | 🇯🇵 JAPAN | 23 | 2♦ | ♥K | +1 | -9 |
| -3.4 | Quarterfinal | NORTON | 2 | 3NT | ♠Q | = | +0 |
| -3.6 | Quarterfinal | NORTON | 11 | 3NT | ♠7 | -1 | -10 |
| -4.0 | Semifinal | SYNREY RDFZ | 1 | 3♠ | ♦6 | = | -1 |
| -4.0 | Final | 🇯🇵 JAPAN | 4 | 4♠ | ♥2 | = | -3 |
| -4.3 | Semifinal | SYNREY RDFZ | 23 | 4♥ | ♣3 | +2 | -12 |
| -4.3 | Semifinal | SYNREY RDFZ | 27 | 5♥x | ♠A | -1 | +5 |
| -4.3 | Semifinal | SYNREY RDFZ | 53 | 5♦x | ♦3 | -3 | +0 |
| -4.3 | Final | 🇯🇵 JAPAN | 2 | 5♣ | ♥7 | -2 | -8 |
| -4.3 | Final | 🇯🇵 JAPAN | 11 | 5♠ | ♣3 | +1 | +11 |
| -4.7 | Quarterfinal | NORTON | 24 | 1NT | ♥7 | +1 | +7 |
| -4.7 | Semifinal | SYNREY RDFZ | 14 | 1♠x | ♠5 | -1 | -8 |
| -6.4 | Quarterfinal | NORTON | 17 | 4♥ | ♠4 | = | -7 |
| -7.0 | Quarterfinal | NORTON | 27 | 4♠ | ♦A | -3 | -10 |
| -7.0 | Final | 🇯🇵 JAPAN | 3 | 6♣ | ♠6 | = | +13 |
| -7.3 | Final | 🇯🇵 JAPAN | 22 | 4♠ | ♣6 | = | -7 |
| -8.3 | Final | 🇯🇵 JAPAN | 5 | 4♥ | ♣K | -2 | -8 |
| -8.7 | Final | 🇯🇵 JAPAN | 28 | 6♠ | ♣3 | +1 | +13 |
| -12.3 | Semifinal | SYNREY RDFZ | 26 | 4♠ | ♣A | -2 | +10 |